The Valve,check, cataloged under National Stock Number 4820-01-435-4640, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control (CAGE 12190) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-435-4640 |
| Primary Part Number | PD 37151-26 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| PD 37151-26 PRIMARY | Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control (USA) |
| PD 37152 ITEM 20 | Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control (USA) |
| Reference | Meaning |
|---|---|
| PD 37151 | D/9 Drawing number reference only Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control |
| PD 37152 | D/9 Drawing number reference only Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control |
NSN 4820-01-435-4640 is a Valve,check, manufactured by Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-435-4640 has 2 manufacturer part numbers on file: PD 37151-26 (Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control), PD 37152 ITEM 20 (Curtiss-Wright Flow Control Corporation Dba Enertech Div Curtiss-Wright Flow Control).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-435-4641. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.